Method for automatically correcting image registration and image transfer system employing this method
AssigneeOce-Technologies B.V.
InventorFranciscus M. J. Linssen
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Abstract
A method and system for automatically correcting image registration in an image transfer system utilizing a plurality of moving image-forming media on each of which an image is formed in response to a corresponding start-of-page signal, and an image carrier moving past each of the image-forming media and brought into contact therewith in a transfer zone, wherein the image-forming media are driven independently from one another and the timing of the start-of-page signals and/or the speed of the image-forming media are controlled to maintain a fixed relationship between the longitudinal image distortions occurring in each transfer zone and the timing of the associated start-of-page signals.
Claims10
A method for automatically correcting image registration in an image transfer system utilizing a plurality of moving image-forming media on each of which an image is formed in response to a corresponding start-of-page signal and an image carrier moving past each of the image-forming media and brought into pressure contact therewith in a transfer zone, which comprises driving the image-forming media independently from one another and controlling the timing of the start-of-page signals and/or the speed of the image-forming media to maintain a fixed relationship between the timing of a start-of-page signal and the longitudinal image distortion differences DS occurring in the associated transfer zone, and wherein the image distortion differences DS are derived from the ratio of the speed differences of the image-forming media and the image carrier.
An image transfer system comprising:
- a plurality of moving image-forming media, each containing an image formed thereon in response to a corresponding start-of-page signal,
- an image carrier operatively associated with each of the image-forming media by being brought into contact therewith in a respective transfer zone,
- separate drive means for each of the image-forming media, and control means for controlling the timing of the start-of-page signals and/or the speed of the image-forming media, thereby maintaining a fixed relationship between the longitudinal image distortions occurring in each transfer zone and the timing of the associated start-of-page signals, wherein the image-forming media are driven only through contact with the moving image carrier, and wherein said control means comprise speed or displacement sensors for each of the image-forming media.
Dependencies are inferred from the claim text.